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Slide 1

Slide 2

Two forms of starch Amylose Amylopectin Amylose is a polymer of glucose Amylopectin is a polymer of joined together by -1,4- glucoses joined by -1,4- glycosidic bonds. Forms a glycosidic bonds but with helix with 6 glucose branches of -1,6-glycosidic molecules per turn and about bonds. This causes the 300 per helix. molecule to be branched rather than helical. Amylopectin molecules may contain up to two million glucose units.Amylose double helical crystal structure…read more

Slide 3

Similarities & Differences between Amylose and AmylopectinSimilarities Differences Both Amylose and Amylopectin are Amylose is an unbranched chain of mainly stored in polysaccharides in glucose where the bond connects carbon atom number 1 in one glucose to carbon plants. atom number 4 in the other glucose. Whereas Amylopectin is a branched polymer as it has a glycosidic link from carbon atom number 6 to carbon atom number 1 in a new glucose molecule. Amylose is a long unbranched chain of glucose, it has a cylinder like structure which it good for storage. Amylopectin is a long branched chain of glucose, its structure is a benefit because enzymes that break glycosidic bonds to break down the molecule get to it faster. This means glucose is released faster.…read more

Slide 4

GlycogenGlucose is stored as glycogen in animal tissues by the process of glycogenesis. Like Amylopectin, it also consists of a-1,4 linkages and a-1,6 linkages, however it has even more branching and more glucose units are present than in Amylopectin. The structure of glycogen consists of long polymer Section of Glycogen Showing ­1,4­ and chains of glucose units connected ­1,6­Glycosidic Linkages by an alpha acetal linkage. Glycogen molecule has many side branches which means it can be broken down very rapidly.…read more